Qt Designer Guide
Qt Designer is a tool for designing and building graphical user interfaces (GUIs) with Qt Widgets. You can create and customize your windows or dialogs in a what-you-see-is-what-you-get (WYSIWYG) manner, and test them using different styles and resolutions.
In this article, we will show you how to use Qt Designer to create a simple PySide app with a main window.
Qt Designer Guide
Step 1: Launch Qt Designer
You can start Qt Designer in the same way as any other application on your development host. You can also launch Qt Designer directly from Qt Creator, which is an integrated development environment (IDE) for Qt applications.
When you launch Qt Designer, you will see the main window, which consists of a menu bar, a tool bar, and a widget box that contains the widgets you can use to create your user interface.
Step 2: Create a new .ui file
To create a new .ui file, go to File -> New File or Project... and select Qt -> Qt Designer Form File. Then choose the type of widget to create, for most applications this will be Main Window. Finally, choose a name and folder for your file.
Step 3: Add widgets to the form
To add widgets to the form, you can drag and drop them from the widget box onto the form. The widget box provides a selection of standard Qt widgets, layouts, and other objects that are grouped into categories that reflect their uses or features. You can also use the scratch pad feature to collect frequently used widgets in a separate category.
For this example, we will add a label, a line edit, and a push button to the form. We will also change their properties using the property editor tool window.
Step 4: Arrange the widgets using layouts
To arrange the widgets on the form, you can use layouts. Layouts are special objects that manage the size and position of the widgets they contain. You can create layouts by selecting one or more widgets and choosing one of the layout options from the tool bar or the context menu.
For this example, we will use a horizontal layout for the label and line edit, and a vertical layout for the whole form. We will also adjust the margins and spacing of the layouts using the property editor.
Step 5: Connect the signals to the slots
To make the widgets interact with each other, you can use signals and slots. Signals are events that are emitted by widgets when something happens, such as clicking a button or entering text. Slots are functions that are called when a signal is received. You can connect signals and slots using the signals and slots editing mode.
For this example, we will connect the clicked signal of the push button to the clear slot of the line edit. This will make the line edit clear its text when the button is clicked.
Step 6: Preview and save the form
To preview how your form looks and behaves, you can use the preview feature. You can access it by clicking on the Form -> Preview... menu option or by pressing Ctrl+R. This will open a separate window that shows your form with its current style and resolution.
To save your form, you can
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